Method and system for optimizing the use of the radio spectrum and computer program product therefor

• US 9,014,232 B2
• Filed: 08/03/2006
• Issued: 04/21/2015
• Est. Priority Date: 08/04/2005
• Status: Active Grant

• Current Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Original Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Inventors: Melpignano, Diego, Mhnen, Petri H.
• Primary Examiner(s): Garcia, Santiago
• Application Number:
  US11/462,206
• Publication Number:
  US 20070053410A1
• Time in Patent Office: 3,183 Days
• Field of Search: 375/130, 455/67.13, 455/522
• US Class Current: 375/130
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A system for scanning a frequency spectrum to detect usage thereof includes an ultra-wideband receiver for performing the scanning, and cooperates with a spectrum usage estimator module and a radio controller unit. The spectrum usage estimator module derives from the scanning performed via the ultra-wideband receiver information as to usage of individual bands in the frequency spectrum. The radio controller unit controls operation of a radio cognitive system as a function of the information as to usage of individual bands in the frequency spectrum as derived by the spectrum usage estimator module. The radio cognitive system operates over unused bands in the frequency spectrum.

Claims

1. A method of scanning a frequency spectrum to detect usage thereof, the method comprising:

performing the scanning via an ultra-wideband (UWB) receiver;

deriving from the scanning, information on usage of individual bands in the frequency spectrum, the information including usage patterns in a time domain;

controlling operation of a radio cognitive system based upon the information for operating the radio cognitive system over unused bands in the frequency spectrum; and

verifying whether a signal received over a certain band is noise or a signal corresponding to spectrum usage, the verifying comprising comparing the signal received over the certain band with at least one reference value and comparing the signal received over the certain band with relative signal strength peaks in adjacent bands, the at least one reference value being retrieved from a table of references values, the references values being associated with respective signal types and frequency bands in the frequency spectrum.

2. The method of claim 1, wherein the UWB receiver is configured as a receiver portion of a UWB transceiver.

3. The method of claim 2, further comprising switching the UWB transceiver between UWB communication operations and the scanning being performed by the UWB receiver portion.

4. The method of claim 2, further comprising using the UWB transceiver to detect a type of transmission occurring over the certain band during the scanning.

5. The method of claim 1, wherein the verifying comprises a time-domain analysis of the signal received over the certain band.

6. The method of claim 1, wherein the UWB receiver is configured as a multi-carrier receiver where spectrum band agility is provided by subcarriers.

7. The method of claim 1, wherein the UWB receiver is configured as a direct sequence receiver comprising pass-band filters to provide spectrum separation for analysis.

8. The method of claim 1, wherein the information includes energy detected in an individual band corresponding to a threshold.

9. The method of claim 1, wherein the information includes an estimated probability that an individual band is being used.

10. A system comprising:

an ultra-wideband (UWB) receiver configured to scan a frequency spectrum to detect usage thereof and comprising a detector configured to detect a signal occurring over a certain band during the scanning;

a spectrum usage estimator module configured to derive from the scanning, information on usage of individual bands in the frequency spectrum, the information including usage patterns in a time domain, and to verify whether the signal received over the certain band is noise or a signal corresponding to spectrum usage;

a radio controller unit configured to control operation of a radio cognitive system based upon the information derived from the scanning so that the radio cognitive system is operated over unused bands in the frequency spectrum; and

a circuit configured to store a table of references values, the references values being associated with respective signal types and frequency bands in the frequency spectrum;

said spectrum usage estimator module configured to verify whether the signal received over the certain band is noise or the signal corresponding to spectrum usage by at least comparing the signal received over the certain band with at least one reference value from the table of reference values and comparing the signal received over the certain band with relative signal strength peaks in adjacent bands.

11. The system of claim 10, wherein said UWB receiver is configured as a receiver portion of a UWB transceiver.

12. The system of claim 11, wherein the UWB transceiver is configured to be selectively switchable between UWB communication operations and the scanning being performed by the UWB receiver portion.

13. The system of claim 10, wherein said spectrum usage estimator module is configured to perform the verifying using a time-domain analysis of the signal received over the certain band.

14. The system of claim 10, wherein said UWB receiver is configured as a direct sequence receiver comprising pass-band filters to provide spectrum separation for analysis.

15. The system of claim 10, wherein said UWB receiver is configured as a direct sequence receiver comprising pass-band filters to provide spectrum separation for analysis.

16. The system of claim 10, wherein the information includes energy detected in an individual band corresponding to a threshold.

17. The system of claim 10, wherein the information includes an estimated probability that an individual band is being used.

18. A non-transitory tangible computer-readable medium having computer-executable instructions for causing a computer to scan a frequency spectrum to detect usage thereof by performing steps comprising:

performing the scanning via an ultra-wideband (UWB) receiver;

deriving from the scanning, information on usage of individual bands in the frequency spectrum, the information including usage patterns in a time domain;

controlling operation of a radio cognitive system based upon the information for operating the radio cognitive system over unused bands in the frequency spectrum; and

verifying whether a signal received over a certain band is noise or a signal corresponding to spectrum usage, the verifying comprising comparing the signal received over the certain band with at least one reference value and comparing the signal received over the certain band with relative signal strength peaks in adjacent bands, the at least one reference value being retrieved from a table of references values, the references values being associated with respective signal types and frequency bands in the frequency spectrum.

19. The non-transitory computer-readable medium of claim 18, wherein the UWB receiver is configured as a receiver portion of a UWB transceiver, the UWB transceiver being used to detect a type of transmission occurring over the certain band during the scanning.

20. The non-transitory computer-readable medium of claim 18, wherein the verifying comprises a time-domain analysis of the signal received over the certain band.

21. The non-transitory computer-readable medium of claim 18, wherein the information includes energy detected in an individual band corresponding to a threshold.

22. The non-transitory computer-readable medium of claim 18, wherein the information includes an estimated probability that an individual band is being used.